The BGS Lexicon of Named Rock Units — Result Details
Esk Evaporite Member
| Computer Code: | EEV | Preferred Map Code: | notEntered |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Olenekian Age (TO) — Olenekian Age (TO) | ||
| Lithological Description: | Mudstone, red-brown, with halite beds and veins, and common mudstone breccias formed from halite dissolution. | ||
| Definition of Lower Boundary: | Conformable, at gradational upward transition from red-brown mudstone to mudstone with halite at the base of the Esk Evaporite Member. | ||
| Definition of Upper Boundary: | Conformable, at gradational transition from mudstone with halite of the Esk Evaporite Member to red-brown mudstone of the undifferentiated Sidmouth Mudstone Formation. | ||
| Thickness: | 7 m at the type section, ranges up to 50 m. | ||
| Geographical Limits: | Cleveland, northeast England. Proved only in the subsurface, not mapped at outcrop. | ||
| Parent Unit: | Sidmouth Mudstone Formation (SIM) | ||
| Previous Name(s): | Esk Evaporite Formation [Obsolete Name and Code: Use EEV]
(-4634)
Keuper Halite (-884) |
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| Alternative Name(s): | Röt Halite Member |
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| Stratotypes: | |||
| Type Section | Staithes No.20 Borehole (NZ71NE/14), Boulby Potash Mine, Cleveland, proves full thickness between 621.2 m and 628.5 m depth. Curated core held at the National Geosciences Records Centre, BGS Keyworth. Woods, 1973. | ||
| Reference(s): | |||
| Warrington, G, Audley-Charles, M G, Elliott, R E, Evans, W B, Ivimey-Cook, H C, Kent, P E, Robinson, P L, Shotton, F W and Taylor, F M. 1980. A correlation of the Triassic rocks in the British Isles. Special Report of the Geological Society of London, No.13. | |||
| Raymond, L R. 1953. Some geological results from the exploration for potash in north-east Yorkshire. Quarterly Journal of the Geological Society of London, Vol. 108, p. 283 - 310. | |||
| Riddler, G P. 1981. The distribution of the Rot Halite Member in North Yorkshire, Cleveland and North Humberside. Proceedings of the Yorkshire Geological Society, Vol.43, 341-346. | |||
| Smith, D B and Pattison, J. 1970. Permian and Triassic. 66-91 in The geology of Durham County. Johnson, G A L and Hickling, G (editors), Transactions of the Natural History Society of Northumbria, Vol.41. | |||
| Woods, P J E. 1973. Potash exploration in Yorkshire: Boulby Mine pilot borehole. Transactions of the Institution of Mining and Metallurgy, Vol.B82, 99-106. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| none recorded or not applicable | |||